1: \ Simple debugging aids
2:
3: \ Copyright (C) 1995,1997 Free Software Foundation, Inc.
4:
5: \ This file is part of Gforth.
6:
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
9: \ as published by the Free Software Foundation; either version 2
10: \ of the License, or (at your option) any later version.
11:
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16:
17: \ You should have received a copy of the GNU General Public License
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21:
22: \ They are meant to support a different style of debugging than the
23: \ tracing/stepping debuggers used in languages with long turn-around
24: \ times.
25:
26: \ IMO, a much better (faster) way in fast-compilig languages is to add
27: \ printing code at well-selected places, let the program run, look at
28: \ the output, see where things went wrong, add more printing code, etc.,
29: \ until the bug is found.
30:
31: \ We support fast insertion and removal of the printing code.
32:
33: \ !!Warning: the default debugging actions will destroy the contents
34: \ of the pictured numeric output string (i.e., don't use ~~ between <#
35: \ and #>).
36:
37: require source.fs
38:
39: defer printdebugdata ( -- ) \ gforth
40: ' .s IS printdebugdata
41: defer printdebugline ( addr -- ) \ gforth
42:
43: : (printdebugline) ( addr -- )
44: cr print-sourcepos ." :"
45: \ it would be nice to print the name of the following word,
46: \ but that's not easily possible for primitives
47: printdebugdata
48: cr ;
49:
50: ' (printdebugline) IS printdebugline
51:
52: : (~~) ( -- )
53: r@ printdebugline
54: r> sourcepos %size + >r ;
55:
56: : ~~ ( compilation -- ; run-time -- ) \ gforth tilde-tilde
57: POSTPONE (~~) sourcepos, ; immediate
58:
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